User have to handle it based on the response message. If you have sample response, probably someone will be able to help you to retrieve and use it in further service calls.
For example, here is some sample script to retrieve, note that it was specific to that response only.
https://github.com/nmrao/soapUIGroovyScripts/blob/b1f3a2eea91b1f82bd5f4c8ff9d4198afd7d3245/groovy/JsonInsideCdata.groovyHere is another example how to set cookie as header to the mentioned step automatically.
https://github.com/nmrao/soapUIGroovyScripts/blob/b1f3a2eea91b1f82bd5f4c8ff9d4198afd7d3245/groovy/SetCookieForNextRequest.groovy